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Graphene-coated nanowires with a drop-shaped cross section for both the strong mode confinement and the long-range propagation
Author(s): Xuan Cong; Yingxue Huang; Min Zhang; Hong Su; Irene Ling Li; Huawei Liang
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Paper Abstract

Both the strong mode confinement and the low propagation loss are longed for designing highly integrated terahertz (THz) devices, but they are difficult to be achieved at the same time. Here, a graphene-coated nanowire with a dropshaped cross section (GNDCS) is proposed with the long-range propagation and strong confinement. We found this waveguide can support two kinds of graphene surface plasmon polaritons (GSPPs), outside-dominant and insidedominant modes, with distinctly different energy distributions. Interestingly, both modes can achieve low-loss propagation with strong mode confinement. In particular, the outside-dominant mode can attain an extremely long propagation length (1mm) and the inside-dominant mode has a very high energy utilization rate. These excellent characteristics make the waveguide very useful in the nanophotonics, bio-photonics and highly integrated THz circuits.

Paper Details

Date Published: 19 September 2018
PDF: 5 pages
Proc. SPIE 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI, 107221Z (19 September 2018); doi: 10.1117/12.2319163
Show Author Affiliations
Xuan Cong, Shenzhen Univ. (China)
Yingxue Huang, Shenzhen Univ. (China)
Min Zhang, Shenzhen Univ. (China)
Hong Su, Shenzhen Univ. (China)
Irene Ling Li, Shenzhen Univ. (China)
Huawei Liang, Shenzhen Univ. (China)


Published in SPIE Proceedings Vol. 10722:
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI
Din Ping Tsai; Takuo Tanaka, Editor(s)

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